Disk harrow



Nov; 17, 1925.

v. A. v. cHAPm DQISK HARROW 2 Sheets-Sheet. 1

Filed May 23. 2

VliV V V H H w m W m5 MW B Nov. 11,1925 7 A. V. CHAPlN DISK HARROW Filed May 23, 1923 2 sheets-6m 2 IINVENTOR. v Andrew I! Chap/77 BY 1% 754404 ATTORNEY Patented Nov. 17, 1925.

UNITED STATES PATENT'T'OF ANDREW V. CHAPIN, OF FERNDALE, CALIFORNIA;

DISK HARROW.

Application filed May 23, 1923.

Z '0 all whom it may concern:

Be it known that 1, ANDREW V. OHAPiN,

' a citizen of the United States, residing at F erndale, in the county of Humboldt and State of California, have invented certain new and useful Improvements in Disk Harrows, of which the following is a specification.

My invention relates in general, to agricultural implements, and in particular, to disk harrows.

Disk harrows with which I am mary object is the provision of a harrow having adjustable gangs of disks that will cut evenly and at a uniform depth.

7 Another object is the provision of a simple shackle means for pivotally connecting the disk gangs together and without interference, regardless of the angular position of the gangs.

Another object is the provision of elfec tive means for effecting the, angular position of the gangs with respect to each other andwithout the use of levers; also means for limiting the angular position.

A further object is to provide the frame of each gang with upstanding braces, to sup-4 port a cross-bar that will prevent buckling of the gangs at the center when in operation.

And a still further object is to provide a quick acting and easy releasing means for the gangs of the harrow, when the latter binds in cutting or in striking a snag.

Other objects and advantages, and the features of construction, will appear in the subjoined description of the accompanying two sheets of drawings, illustrating the present embodiment of my invention, and in which:

Figure 1 shows a plan of the harrow-constructed in accordance with my invention.

Figure 2 is a partial sectional elevation along the line A-A of Fig. 1 and looking in the direction of the arrows.

Figure 3 is a plan of the harrow with the disk gangs in an angular position ready for working engagement.

Figure .4: is an end elevation of Fig 1,

familiar, buckle upwards at the center veryfrequently 'in operation, and thus the depth of cut in Serial No. 640,976.

showing in particular the v upright braces supporting the cross-bar thereon.

Adverting to the drawings and the figures thereof: The numeral l represents the frame for a series of cutter disks 2. 3 is a similar frame for the same purpose but constructed to the oppositehand. The frames in this instance, are constructed of angle-iron, the members of which are secured together in any approved manner. 7

To the frame members l are secured bearings 5, to support a shafts. This shaft rigidly carries, and as a unit, the'disks 2 spaced apart by spacers 7, which latter may be in two sections interlocking each other as at 8. When the series of disks are assembled, the end nuts 9 are tightened and the whole secured together as a unit, as shownin Fig. 2. This unit is, then supported in the bearings 5 and the spacers may serve as the journals.

The rear member of each frame is extend ed and turned inward as at 10, and these members are pivotally connected together by a shackle 11. The shackle permits ease of movement at this union, and in conjunction with a chain 12 or the like, to be later described, keeps the innermost disk of each gang apart from each other to avoid crushing or breaking or other interference.

To each frame and near the outer ends thereof, are secured inverted U-braces 13, the top surfaces of which register in a plane parallel to the axes of the shafts 6, The said braces movably support a cross-bar 14:,vpreferably of channel form, on the said surfaces. Near each end of the cross-bar is a slot 15, for permitting the bar to slidably engage a fixed bolt 16 or the like, secured to each outermost brace-13. The purpose of the cross-bar will be later set forth. r

To the front member of each frame near ber 18 as will be presently set forth. Piv-' otal arms 21 extend from each sideof the draft member and engage chain members 22 or the like, which latter are pivotally and adjustably connected near theextremities of the front members of the frame; by the clevis 23, through holes 24 in the frame.

In operation, and as shown in Fig. 1, the harrow simply rides or rolls over the ground, but when the control chain is hooked as in Fig. 3, the barrow, when thedraft is applied, assumes an angular position to correspond with the link of the control chain engaged on the hook 20, thus the degree of earth-cut is determined by the angleone gang makes With the other. I

\Vhe'n the chain 12 is in a straight line (approaching in'Fig. 3) from arm to arm, the limit of angular position has been reached, the length being such as to prevent the inner disks from touching. I

Should the harroW bind, or strikea snag While" in engagement, the draft appliance is moved backwards by hand, and the control chain idi sengaged and a new link nearer the chain 12 engaged. WVhen the draft is again applied, the harrow Will easily and immediatelystraighten as shown in Fig. 1, and aride out of the difiiculty.

Begardlessjof the angular'position of the tWosets of disks, it will be observed that the ci oss-barlis'always o'n the top surface ofthe braces, thus buckling at the center isprevented and an even depth of groundcut is assured.

jFromthe foregoing description taken in connection Withthe accompanying drawings, the advantages of the construction and metho'dj of operation Will be readily understood by those skilled'in the art to Which the inventionavppeitains an'd' While I have describ dthe principle of operation, together ith the device which I now" consider to be the best embo diin'entthereof, I desire to have it understood that the device shown is merely illustrative and that such changes may be made when desired, as fall Within the scope of the appended claims.

,Having hus'descriloed my invention, What I cla m as new andsdesireto secureby LettersP-atent of the United States, is the-following:

1. A barrow comprising frames, gang disks and a cross-bar, the frames being pivotally connected together by a shackle and each frame thereof provided With a gang of disks andW-ith- U-braces arranged transversethe shackle,jfiexibledraft elements connected to the outer approximate extremities of the front of said frames and having a-draft appliance connected therebetween, a fleXible element of fixed length connected to the extremities of said arms and having aiflexible draft element leading therefrom and adapted for coupling'to said draft appliance for determining the angular Working positions of the harrow, the said element of fixed length determining the maximum non-interference angular position of the gang disks When the said arms arein maximum em brace. V

'3. A harrow comprising a right and a left-hand frame, a gang of disks'supported in each frame, a shackle connecting the frames together, arms on the frames opposite the shackle, yielding draft elements fconnected'to the outer approximate extremities of the'front of said'frames-and having a draft appliance connectedtherebetween, a

yielding element of fixed length connected to=the extremities of:.said arms and having a yielding draft elei nent'leading therefrom and "adapted for coupling tosaid draft appliance for determining the angular worklllg positionsof,the'harromthe Stud element of fixed "lengthdetermining the maximum non-interference angular position of the gang disks when the said arms are in maximum embrace, and across-bar slidably engaging the. said frames 'above'the gang disks for determining uniform depth of earthout.

:In testimony whereof I aflix my signature.

' ANDREW V. fOI-I-AiPIN. 

